| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![feature(box_syntax)] |
| |
| struct Foo { |
| x: isize |
| } |
| |
| impl Drop for Foo { |
| fn drop(&mut self) { |
| println!("drop {}", self.x); |
| } |
| } |
| |
| fn main() { |
| let mut ptr: Box<_> = box Foo { x: 0 }; |
| let mut test = |foo: &Foo| { |
| println!("access {}", foo.x); |
| ptr = box Foo { x: ptr.x + 1 }; |
| println!("access {}", foo.x); |
| }; |
| test(&*ptr); |
| //~^ ERROR: cannot borrow `*ptr` as immutable |
| } |
